| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Port Jackson | city | Illinois | United States | 38.86 | -87.78 | 830 | |
| Port Jackson (historical) | city | Louisiana | United States | 30.70 | -91.32 | 9 | |
| Port Jefferson | city | New York | United States | 40.95 | -73.07 | 98 | |
| Port Jefferson | city | Ohio | United States | 40.33 | -84.09 | 1049 | |
| Port Jefferson Station | city | New York | United States | 40.93 | -73.05 | 147 | |
| Port Jenkins | city | Pennsylvania | United States | 41.08 | -75.77 | 1197 | |
| Port Jervis | city | New York | United States | 41.38 | -74.69 | 830 | |
| Port Johnson | city | New Jersey | United States | 40.65 | -74.12 | 3 |